ITEM NAME:10Pcs 25mm S2 Steel Screwdriver Bits Hex Shank Torque PH2 Antislip Magnetic.Hex Shank Torque PH2 Screwdriver Tool Set. Tip Type: PH2. Using the advanced S2 steel, the overall induction hardening, not easy to wear. Material: S2 Steel. Hex Shank Dia: 6.35mm/ 1/4". 10 x Screwdriver Bit.